IOMMU: Groups support

These are the IOMMU related patches from the v2 IOMMU Groups +
VFIO series.  I've separated out PCI and VFIO to try to make
progress on the foundation we need for VFIO.  Patches 5 & 6
of this series depend on patches 1 & 2 of the PCI series found
here:

http://marc.info/?l=linux-kernel&m=133835363021384

Patch 1 adds an iommu_group pointer to struct device so that we
have a place to link a device to a specific iommu group.  GregKH
has already acked this, so it should go in with the group support
itself.  Patch 2 is the core of the IOMMU group support.  Patches
3 & 4 allow groups to be created on AMD-Vi and Intel VT-d systems.
Patches 5 & 6 make use of the additional PCI DMA quirks and ACS
support checking to make groups more secure.  Patch 7 removes the
iommu=group_mf option as ACS checking results in most multifunction
devices being grouped already.

These patches, as well as the PCI support patches and VFIO can be
found in git here:

git://github.com/awilliam/linux-vfio.git (iommu-group-vfio-next-20120529)

Please consider these for 3.5, but I'll settle for any kind of next
branch.  Thanks,

Alex

---

Alex Williamson (7):
      iommu: Remove group_mf
      intel-iommu: Make use of DMA quirks and ACS checks in IOMMU groups
      amd_iommu: Make use of DMA quirks and ACS checks in IOMMU groups
      intel-iommu: Support IOMMU groups
      amd_iommu: Support IOMMU groups
      iommu: IOMMU Groups
      driver core: Add iommu_group tracking to struct device


 .../ABI/testing/sysfs-kernel-iommu_groups          |   14 
 Documentation/kernel-parameters.txt                |    1 
 arch/ia64/include/asm/iommu.h                      |    2 
 arch/ia64/kernel/pci-dma.c                         |    1 
 arch/x86/include/asm/iommu.h                       |    1 
 arch/x86/kernel/pci-dma.c                          |   11 
 drivers/iommu/amd_iommu.c                          |   62 +-
 drivers/iommu/intel-iommu.c                        |   82 ++-
 drivers/iommu/iommu.c                              |  578 +++++++++++++++++++-
 include/linux/device.h                             |    2 
 include/linux/iommu.h                              |  104 +++-
 11 files changed, 751 insertions(+), 107 deletions(-)
 create mode 100644 Documentation/ABI/testing/sysfs-kernel-iommu_groups
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